Fix build warnings on MSVC x64 and OS X clang
minor Android tutorial fixes
removing redundant picture resize
Fix a bug in addWeighted x64 mode
And a potential problem in remap
Merge pull request #601 from apavlenko:android_tutorial_update
Avoid build falure in armeabi build with Android SDK
Merge pull request #600 from taka-no-me:fix_build_warnings
Merge pull request #602 from bitwangyaoyao:2.4_fixAdd
Merge pull request #603 from taka-no-me:avoid_deps_on_missing_lib
Disable -fomit-frame-pointer for OS X Clang as it leads to crash on exception thrown